The dog at Casa Luna
The homeowners at Casa Luna have an adorable little dog; very friendly to visitors!
HAL Shore Excursion
I used the ship's shore excursion; the cost, since transportation from the port to Lima must be arranged and the tours available in town would cover more sights than I had time for. An internet search will, however, reveal quite a few vendors for both of these locations.
Another Tour Source
We didn't use this service, but I met several people on our cruise who did and they were pleased with their experiences. The Mirabus, which is among several options on this site was mentioned especially, but every tour is not always available every day; plan to research it in advance. LIMAEASY
Portside Wi-Fi Available
There is a small convenience store just inside the outer gate; take the free shuttle from the ship to this area. It is not safe to venture out into Callao; the ship warned us and we heard of more than one incident of robbery/attempted robbery in the port vicinity, leading to an even stronger warning from the ship.
I was told that the downtown area, near the Indian Handicraft Market, had street-accessible wi-fi, but I did not find that to be true. However, adjacent to the Handicraft Market is a computer store, with many vendors inside. I'm sure several offer wi-fi; I held up my iPhone in iMagination, an Apple re-seller, and the manager gave me their password and a chair where I used this excellent connection for 30 minutes or so. Another passenger from the ship reported that she had used her iPad there, as well.